| Cover Page | Mar. 31, 2021 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Document Period End Date | Mar. 31, 2021 |
| Entity Registrant Name | Axos Financial, Inc. |
| Entity Incorporation, State or Country Code | DE |
| Entity File Number | 001-37709 |
| Entity Tax Identification Number | 33-0867444 |
| Entity Address, Address Line One | 9205 West Russell Road, STE 400 |
| Entity Address, City or Town | Las Vegas |
| Entity Address, State or Province | NV |
| Entity Address, Postal Zip Code | 89148 |
| City Area Code | 858 |
| Local Phone Number | 649-2218 |
| Title of 12(b) Security | Common stock, $.01 par value |
| Trading Symbol | AX |
| Security Exchange Name | NYSE |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Entity Emerging Growth Company | false |
| Entity Central Index Key | 0001299709 |
| Amendment Flag | false |
